Discussion on ventilation system design of underground utility tunnels

This paper discusses several design problems of ventilation systems of underground utility tunnels based on the practical projects. When the ventilation compartment crosses two or three fire compartments, the measure to unblock the ventilation by adding valves on the firewall is given. According to the different operating conditions of each tunnel, the selection method of the fire dampers at the outlet of fans and the fire dampers at the inlet of exhaust fan is provided. The setting principles of the emergency ventilation systems and the smoke exhaust systems after emergency are sorted out, and it is proposed that the emergency ventilation system should be set up in the tunnel of the heat distribution pipeline.